Per my answer above: the situation where nobody can be trusted is horribly unstable, because evidence-based or impartial policymaking or even justice becomes impossible. This tends to result in replacing trust relationships with force relationships, and the society devolves into warlordism or dictatorship in order to restore order and control. You can't expect people to trust an election where all candidates are disreputable, so they vote in a dictator.
This is why the unreliability of news organizations is such a serious problem.
This is why the unreliability of news organizations is such a serious problem.